/* ================= 帮助中心 /help/ ================= */

.page-faq .faq-hero {
  position: relative;
  padding: 26px 0 38px;
  color: var(--paper);
  background:
    repeating-linear-gradient(90deg, rgba(245, 241, 231, .07) 0 1px, transparent 1px 18px),
    var(--turf-deep);
  border-bottom: 4px solid var(--amber);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 26px;
}

@media (min-width: 880px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: end;
  }
}

.page-faq .faq-hero .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--on-dark-dim);
}

.page-faq .faq-hero .breadcrumbs a {
  color: var(--amber-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--t);
}

.page-faq .faq-hero .breadcrumbs a:hover {
  border-bottom-color: currentColor;
}

.page-faq .faq-hero .breadcrumbs__sep {
  color: var(--on-dark-dim);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  max-width: 22ch;
  font-family: var(--f-cond);
  font-size: clamp(30px, 7.2vw, 46px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 52ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--on-dark);
}

.page-faq .faq-hero__media {
  margin: 0;
  padding: 10px;
  border: 1px solid rgba(245, 241, 231, .35);
  background: rgba(245, 241, 231, .06);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-hero__cap {
  padding: 9px 2px 0;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--on-dark-dim);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: 28px;
  padding-top: 40px;
  padding-bottom: 64px;
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 258px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
    padding-top: 52px;
  }
}

/* ---------- 左侧问题索引 ---------- */

.page-faq .faq-index {
  min-width: 0;
}

@media (min-width: 1000px) {
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }
}

.page-faq .faq-index__label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-index__label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

@media (min-width: 1000px) {
  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px 9px 10px;
  border-left: 3px solid transparent;
  background: var(--paper-lift);
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--t), background var(--t), color var(--t);
}

@media (min-width: 1000px) {
  .page-faq .faq-index__link {
    white-space: normal;
  }
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--amber);
  background: var(--amber-soft);
  color: var(--ink);
  outline: none;
}

.page-faq .faq-index__num {
  flex: none;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--slate);
}

/* ---------- 章节 ---------- */

.page-faq .faq-content {
  min-width: 0;
}

.page-faq .faq-sec {
  margin: 0 0 44px;
  scroll-margin-top: 96px;
}

.page-faq .faq-sec:last-child {
  margin-bottom: 0;
}

.page-faq .faq-sec__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
  transition: border-color var(--t);
}

.page-faq .faq-sec:target .faq-sec__head {
  border-bottom-color: var(--amber);
}

.page-faq .faq-sec__num {
  flex: none;
  padding: 3px 8px;
  border-radius: 2px;
  background: var(--amber);
  color: var(--ink);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .06em;
}

.page-faq .faq-sec__head h2 {
  margin: 0;
  font-size: clamp(20px, 4.2vw, 26px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.page-faq .faq-sec__intro {
  margin: 0 0 8px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 可展开问答组 ---------- */

.page-faq .faq-folds {
  margin-top: 6px;
}

.page-faq .fold {
  border-bottom: 1px solid var(--line-soft);
  border-left: 3px solid transparent;
  transition: border-color var(--t), background var(--t), padding var(--t);
}

.page-faq .fold:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-faq .fold[data-open="true"] {
  border-left-color: var(--amber);
  background: var(--paper-lift);
  padding: 0 14px;
}

.page-faq .fold__btn {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 16px 0;
  border: 0;
  background: none;
  color: var(--ink);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: color var(--t);
}

.page-faq .fold__btn:hover .fold__title {
  color: var(--turf-mid);
}

.page-faq .fold__btn:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: -2px;
}

.page-faq .fold__index {
  flex: none;
  min-width: 24px;
  padding-top: 4px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--slate);
}

.page-faq .fold__title {
  flex: 1;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: .01em;
  transition: color var(--t);
}

.page-faq .fold__sign {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 5px;
  border: 1px solid var(--line);
  transition: background var(--t), border-color var(--t);
}

.page-faq .fold__sign::before,
.page-faq .fold__sign::after {
  content: "";
  position: absolute;
  background: var(--slate);
  transition: transform var(--t), background var(--t);
}

.page-faq .fold__sign::before {
  left: 3px;
  right: 3px;
  top: 8px;
  height: 1.5px;
}

.page-faq .fold__sign::after {
  top: 3px;
  bottom: 3px;
  left: 8px;
  width: 1.5px;
}

.page-faq .fold[data-open="true"] .fold__sign {
  border-color: var(--amber);
  background: var(--amber);
}

.page-faq .fold[data-open="true"] .fold__sign::before,
.page-faq .fold[data-open="true"] .fold__sign::after {
  background: var(--ink);
}

.page-faq .fold[data-open="true"] .fold__sign::after {
  transform: scaleY(0);
}

.page-faq .fold__panel {
  padding: 0 0 18px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-faq .fold__panel > * {
  margin: 0 0 10px;
}

.page-faq .fold__panel > *:last-child {
  margin-bottom: 0;
}

.page-faq .fold__panel p {
  max-width: 66ch;
}

.page-faq .faq-term {
  border-bottom: 1px dashed var(--slate-soft);
  text-decoration: none;
  cursor: help;
}

.page-faq .faq-term:hover {
  border-bottom-color: var(--amber);
  background: var(--amber-soft);
}

/* ---------- 统计范围横幅 ---------- */

.page-faq .faq-band {
  margin: 0 0 22px;
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--paper-lift);
  box-shadow: var(--shadow-print);
}

.page-faq .faq-band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-faq .faq-band figcaption {
  padding: 9px 4px 2px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate);
}

/* ---------- 窄屏收敛 ---------- */

@media (max-width: 640px) {
  .page-faq .faq-hero {
    padding: 20px 0 30px;
  }

  .page-faq .faq-hero__lead {
    font-size: 16px;
  }

  .page-faq .faq-body {
    padding-top: 28px;
    padding-bottom: 48px;
  }

  .page-faq .flush-on-mobile {
    padding-left: 0;
  }

  .page-faq .fold__btn {
    gap: 10px;
    padding: 14px 0;
  }

  .page-faq .fold[data-open="true"] {
    padding: 0 10px;
  }

  .page-faq .fold__title {
    font-size: 16px;
  }

  .page-faq .fold__index {
    min-width: 20px;
  }

  .page-faq .fold__panel {
    padding-bottom: 16px;
    font-size: 15px;
  }

  .page-faq .faq-band {
    box-shadow: 6px 6px 0 rgba(70, 89, 107, .14);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .fold,
  .page-faq .fold__btn,
  .page-faq .fold__title,
  .page-faq .fold__sign,
  .page-faq .fold__sign::before,
  .page-faq .fold__sign::after,
  .page-faq .faq-sec__head,
  .page-faq .breadcrumbs a {
    transition: none;
  }
}